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AN/APG-81 AESA Radar

AN/APG-81 AESA Radar

Manufacturer: Northrop Grumman
Category: Radar Systems
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Detection Range About 150 km or more publicly cited; exact operational performance classified
Frequency Band X-band
Antenna Type / Technology Active Electronically Scanned Array (AESA)
Target Tracking Capacity Multiple simultaneous air targets; exact official capacity classified

Full Specifications

1. General Information

Name / Designation	AN/APG-81
Manufacturer	Northrop Grumman
Country of Origin	United States
Type / Role	Airborne AESA multifunction fire-control radar
Operational Domain	Air, surface, maritime, electronic warfare
Status	Operational and in production

2. Technical Specifications

Frequency Band	X-band
Antenna Type	Active electronically scanned array
Antenna Aperture / Size	Approximately 700 mm, publicly reported
Power Output	Not publicly disclosed
Detection Range	Approximately 150 km or more publicly cited; configuration and target dependent
Tracking Range	Not publicly disclosed
Target Tracking Capacity	Multiple simultaneous targets; exact capacity classified
Elevation Coverage	Exact operational coverage not publicly disclosed
Azimuth Coverage	Exact operational coverage not publicly disclosed
Beam Steering	Electronic, solid-state beam steering
Pulse Repetition Frequency (PRF)	Classified / not publicly disclosed
Resolution	High-resolution SAR capability; exact figures classified
Update Rate	Not publicly disclosed
Clutter Rejection / ECCM	Advanced electronic protection and clutter-management capabilities

3. Functional Capabilities

Primary Functions	Air-to-air search and track, air-to-ground targeting, SAR mapping, maritime search, navigation, weather sensing, electronic warfare
Target Types	Aircraft, surface targets, maritime targets, ground targets, selected missile and rocket threats
Integration / Networking	Integrated with F-35 mission systems and sensor-fusion architecture
IFF Capability	Integrated identification functions through the F-35 avionics architecture
Data Link / Networking	Integrated with F-35 communications and data-link systems
Weather & Terrain Resistance	Designed for all-weather airborne operations
Mobility / Mounting	Fixed internal installation in the F-35 nose

4. Physical & Operational Characteristics

Dimensions	Approx. 700 mm antenna diameter publicly reported; complete radar dimensions classified
Weight	Not publicly disclosed
Power Requirement	Not publicly disclosed
Cooling System	Aircraft-integrated cooling system; detailed specifications classified
Operating Temperature Range	Not publicly disclosed
Deployment Platform	F-35A, F-35B, F-35C
Crew Requirement	No dedicated radar operator; operated through the F-35 pilot and mission systems

5. Software & Processing

Signal Processor Type	Digital, software-controlled radar processing architecture
Processing Speed	Not publicly disclosed
AI / Automation Features	Automated detection, tracking, sensor management, and mission-system integration; specific AI capabilities not publicly disclosed
Data Output / Interface	Integrated F-35 tactical and sensor-fusion architecture
Software Upgradeability	Software-enabled architecture supports capability updates

6. Operational History

Year Introduced	Developed for the Joint Strike Fighter program; operational with F-35 fleet
Users / Operators	United States and F-35 international operators
Notable Deployments	F-35 operational and training fleets worldwide
Successor / Predecessor	Successor to earlier Northrop Grumman fighter AESA technology; AN/APG-85 is being developed as a future F-35 radar

7. Export / Compliance Data

Export Availability	Exported as part of approved F-35 international programs
ITAR / MTCR Status	U.S.-controlled defense technology; specific export-control classification is not publicly detailed here
Cost Estimate	Standalone APG-81 unit price not publicly established

Our Rating

The overall rating is based on review by our experts

9.8

Range & Endurance 10 / 10
Stealth Capability 10 / 10
Technology 10 / 10
Maintenance Efficiency 9 / 10

PROS

AESA technology provides rapid electronic beam steering
Supports air-to-air and air-to-ground missions
Includes high-resolution SAR mapping
Provides integrated electronic warfare functions
Designed for high reliability and modular maintenance

CONS

Detailed performance data remain classified
Radar-only pricing is not publicly available
Detection range varies substantially by target conditions
Performance depends on integration with the F-35 mission system
Designed specifically around the F-35 rather than general aircraft integration

Manufacturer

The AN/APG-81 was developed and is produced by Northrop Grumman in the United States. It was selected for the Joint Strike Fighter program in 2001 and is installed across the F-35A, F-35B, and F-35C variants.

Speed and Range

The APG-81 is a radar rather than an aircraft or missile, so speed and physical weapon range do not apply. Public sources commonly cite a detection range of about 150 km or more, but actual performance varies with target size, altitude, aspect, environmental conditions, radar mode, and electronic warfare conditions. Exact performance figures remain classified.

Cost / Price

A standalone unit price for the AN/APG-81 is not publicly established. F-35 procurement contracts normally combine radar, aircraft, mission systems, support, and other equipment, making a direct radar-only price difficult to determine.

FAQs

What is the AN/APG-81 radar?

The AN/APG-81 is a Northrop Grumman AESA multifunction fire-control radar installed on all three F-35 variants.

What aircraft uses the AN/APG-81?

The radar is used by the F-35A conventional takeoff and landing variant, F-35B short takeoff and vertical landing variant, and F-35C carrier variant.

Is the AN/APG-81 an AESA radar?

Yes. It uses active electronically scanned array technology with solid-state transmit and receive elements.

What can the AN/APG-81 detect?

It supports detection and tracking of airborne, ground, and maritime targets. Its SAR mode provides high-resolution ground mapping, while its broader multifunction architecture supports electronic warfare and other missions.

How much does the AN/APG-81 radar cost?

There is no reliable public standalone price for the complete radar. F-35 procurement costs generally include multiple aircraft systems and support elements, so contract totals should not be treated as the radar’s unit price.

Reviews

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